diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 9087183602e4..194a9f995c36 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -768,6 +768,8 @@ static void __mb_check_buddy(struct ext4_buddy *e4b, char *file,
 		ext4_group_t groupnr;
 		struct ext4_prealloc_space *pa;
 		pa = list_entry(cur, struct ext4_prealloc_space, pa_group_list);
+		if (!pa->pa_len)
+			continue;
 		ext4_get_group_no_and_offset(sb, pa->pa_pstart, &groupnr, &k);
 		MB_CHECK_ASSERT(groupnr == e4b->bd_group);
 		for (i = 0; i < pa->pa_len; i++)